제출 #1229818

#제출 시각아이디문제언어결과실행 시간메모리
1229818nhnguyen14Sob (COCI19_sob)C++20
0 / 110
0 ms320 KiB
#include<bits/stdc++.h> using namespace std; typedef long long LL; const int MAXLOG=20; const int N=(int)1e6; int n,m; namespace subtask1{ bool check(){ return n+m<=1000; } int f[N+2]={}; void main_code(){ int cnt=0; for(int i=0;i<n;++i){ for(int j=m;j<m+n;++j) if ((j&i)==i) ++f[j]; } for(int j=m;j<n+m;++j) assert(f[j]>0); for(int i=n-1;i>=0;--i){ int mxx=n+1,v=-1; for(int j=m;j<=n+m-1;++j){ if (f[j] && mxx>f[j]){ mxx=f[j]; v=j; } } assert(v!=-1); f[v]=0; cout<<i<<' '<<v<<'\n'; for(int j=m;j<=m+n-1;++j) { if (f[j]>0 && (j&i)==i) --f[j]; } } return; } } int main(){ ios::sync_with_stdio(false); cin.tie(0) ; cout.tie(0); #define task "main" if (fopen(task".inp","r")){ freopen(task".inp","r",stdin); // freopen(task".out","w",stdout); } cin>>n>>m; if (subtask1::check()) return subtask1::main_code(),0; assert(false); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

sob.cpp: In function 'int main()':
sob.cpp:46:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |                 freopen(task".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
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